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21.
Jalali R 《Disasters》2002,26(2):120-139
On 17 August 1999 Turkey was hit by a massive earthquake. Over 17,000 lives were lost and there was extensive damage to Turkey's heartland. This paper examines how various public and private institutions, including state and civil society institutions such as NGOs and the media responded to the needs of earthquake survivors. It documents the extensive involvement of NGOs in the relief efforts immediately after the disaster and examines the impact of such participation on state-civil society relations in the country. The data show that state response to the disaster went through several phases from a period of ineptitude to effective management. The paper credits the media and the NGOs for acting as advocates for survivors and forcing changes at the state level. The paper argues that an ideal response system, which fully addresses the needs of victims, can only be based on state-civil society relations that are both collaborative and adversarial. 相似文献
22.
This aims of this community education initiative is to foster sustainability consciousness and behavioural change in the UK's minority Hindu community and determine how awareness affects behavioural intentions. This report compares the effectiveness of an educational experience designed for the congregation at the Janmashtami Festival organized at Bhaktivedanta Manor Temple with its effectiveness at two external events. The experience involves a series of exhibits that link environmental themes with spiritual lifestyle choices through an Ecological Footprint questionnaire, a consultation session, and a pledge tree where respondents vow to make one lifestyle change. Despite the differences in religious context and audience demographic, results are similar. Participants recognized a wide range of lifestyle‐related sustainability issues but were persuaded to pledge changes that were small, easily achieved and tightly specified. They avoided issues that involved major impacts on their lives and were most positive to changes considered to be aligned with the majority values of their community. Copyright © 2010 John Wiley & Sons, Ltd and ERP Environment. 相似文献
23.
Caio F. Gromboni George L. Donati Wladiana O. Matos Eduardo F. A. Neves Ana Rita A. Nogueira Joaquim A. Nóbrega 《Environmental Chemistry Letters》2010,8(1):73-77
Efficiency of metabisulfite and a commercial steel wool as reducing agents in the removal of Cr(VI) from wastewaters was evaluated.
Chromium(VI) was converted to Cr(III), precipitated with NaOH, and removed by filtration. A reduction of more than 1.0 × 105 and 4.0 × 105 fold in total Cr and the Cr(VI) concentrations, respectively, was observed by employing steel wool masses as low as 0.4420 g
to 30-mL solutions of wastewater. Chromium(III) hydroxide obtained after the treatment was recycled and used as marker in
cattle nutrition studies. The liquid residue obtained after the treatment was reused as precipitation agent replacing NaOH. 相似文献
24.
25.
Application of adaptive cluster sampling to low-density populations of freshwater mussels 总被引:5,自引:0,他引:5
David R. Smith Rita F. Villella David P. Lemarié 《Environmental and Ecological Statistics》2003,10(1):7-15
Freshwater mussels appear to be promising candidates for adaptive cluster sampling because they are benthic macroinvertebrates that cluster spatially and are frequently found at low densities. We applied adaptive cluster sampling to estimate density of freshwater mussels at 24 sites along the Cacapon River, WV, where a preliminary timed search indicated that mussels were present at low density. Adaptive cluster sampling increased yield of individual mussels and detection of uncommon species; however, it did not improve precision of density estimates. Because finding uncommon species, collecting individuals of those species, and estimating their densities are important conservation activities, additional research is warranted on application of adaptive cluster sampling to freshwater mussels. However, at this time we do not recommend routine application of adaptive cluster sampling to freshwater mussel populations. The ultimate, and currently unanswered, question is how to tell when adaptive cluster sampling should be used, i.e., when is a population sufficiently rare and clustered for adaptive cluster sampling to be efficient and practical? A cost-effective procedure needs to be developed to identify biological populations for which adaptive cluster sampling is appropriate. 相似文献
26.
27.
The aim of this study was to determine and quantify effects of copper and lithium in tissues of early juveniles of the ramshorn snail, Marisa cornuarietis. For this purpose, hatchlings of M. cornuarietis were exposed for 7 days to a range of five different sublethal concentrations of copper (5, 10, 25, 50, and 75 μg Cu2+ L−1) and lithium (50, 100, 200, 1000, and 5000 μg Li+ L−1). Both metals changed the tissue structure of epidermis, hepatopancreas, and gills, varying between slight and strong reactions, depending on the copper and lithium concentration. The histopathological changes included alterations in epithelial and mucous cells of the epidermis, swelling of hepatopancreatic digestive cells, alterations in the number of basophilic cells, abnormal apices of digestive cells, irregularly shaped cilia and changes in the amount of mucus in the gills. The most sensible organ in M. cornuarietis indicating Cu or Li pollution is the hepatopancreas (LOECs were 10 μg Cu2+ L−1, or 200 μg Li+ L−1). In epidermis, mantle and gills relevant effects occurred with higher LOECs (50 μg Cu2+ L−1, or 1000 μg Li+ L−1). Base on LOECs, our results indicated that histopathological endpoints are high sensitivity to copper and lithium compared to endpoints for embryonic developmental toxicity. 相似文献
28.
Eduardo Ferreira da Silva Paula Freire Ávila Ana Rita Salgueiro Carla Candeias Henrique Garcia Pereira 《Environmental science and pollution research international》2013,20(11):7534-7549
Through the years, mining and beneficiation processes produces large amounts of As-rich mine wastes laid up in huge tailings and open-air impoundments (Barroca Grande and Rio tailings) that are the main source of pollution in the surrounding area once they are exposed to the weathering conditions leading to the formation of AMD and consequently to the contamination of the surrounding environments, in particularly soils. In order to investigate the environmental contamination impact on S. Francisco de Assis (village located between the two major impoundments and tailings) agricultural soils, a geochemical survey was undertaken to assess toxic metals associations, related levels and their spatial distribution, and to identify the possible contamination sources. According to the calculated contamination factor, As and Zn have a very high contamination factor giving rise to 65.4 % of samples with a moderate to high pollution degree; 34.6 % have been classified as nil to very low pollution degree. The contamination factor spatial distribution put in evidence the fact that As, Cd, Cu, Pb, and Zn soils contents, downstream Barroca Grande tailing, are increased when compared with the local Bk soils. The mechanical dispersion, due to erosion, is the main contamination source. The chemical extraction demonstrates that the trace metals distribution and accumulation in S. Francisco de Assis soils is related to sulfides, but also to amorphous or poorly crystalline iron oxide phases. The partitioning study allowed understanding the local chemical elements mobility and precipitation processes, giving rise to the contamination dispersion model of the study area. The wind and hydrological factors are responsible for the chemical elements transport mechanisms, the water being the main transporter medium and soils as one of the possible retention media. 相似文献
29.
Teuschler LK Gennings C Hartley WR Carter H Thiyagarajah A Schoeny R Cubbison C 《Chemosphere》2005,58(9):1283-1291
The United States Environmental Protection Agency (USEPA) has pursued the estimation of risk of adverse health effects from exposure to chemical mixtures since the early 1980s. Methods used to calculate risk estimates of mixtures were often based on single chemical information that required assumptions of dose-addition or response-addition and did not consider possible changes in response due to interaction effects among chemicals. Full factorial designs for laboratory studies can produce interactions information, but these are expensive to perform and may not provide the information needed to evaluate specific environmentally relevant mixtures. In this research, groups of Japanese medaka (Oryzias latipes) embryos were exposed to binary mixtures of benzene and toluene as well as to each of these chemicals alone. Endpoint specific dose-response models were built for the hydrocarbon mixture under an assumption of dose-additivity, using the single chemical dose-response information on benzene and toluene. The endpoints included heart rate, heart rate progression, and lethality. Results included a synergistic response for heart rate at 72 h of development, and either additivity or antagonism for all other endpoints at 96 h of development. This work uses an established statistical method to evaluate the toxicity of an environmentally relevant mixture to ascertain whether interaction effects are occurring, thus providing additional information on toxicity. 相似文献
30.
Rita Mayrhofer 《Local Environment》2013,18(12):1207-1224
ABSTRACTUrban gardening in Vienna, Austria, has gained a new significance over the last ten years. However, although demand is constantly rising and urban gardening is being marketed in many ways, a vast majority of the urban population still has no access to gardening and its various benefits. While community gardening projects in Europe are usually viewed as temporary, self-organised bottom-up initiatives on public or abandoned private land, this case study of the Roda-Roda pilot project shows that community gardening can develop and persist even when favourable conditions for grassroots community gardens are lacking. The vast green spaces separating residential blocks (Abstandsgrün) commonly found in Vienna’s municipal housing (Wiener Gemeindebau) have a huge spatial potential for gardening, along with a forgotten tradition of self-organisation. Using an action research approach, this paper describes two principles for a successful implementation strategy under difficult conditions. Starting with a top-down approach, an interdisciplinary project team implemented a spatial and socio-economic framework that offered a stable basis for participatory community-building. As they “climbed” the ladder of participation stepwise – from exclusion to decision-making and true self-organisation – gardeners gained knowledge, skills and the self-confidence required to run a garden and create a well-working local community. At a more general level, the paper brings a co-creative planning perspective to the scientific discussion on community gardening in Europe and offers a practical approach to making local gardening opportunities available to suitable target groups by tapping into unused spatial potential. 相似文献